Single Disc CD Player: The Cambridge Audio Azur 651C
single disc compact disc player has been designed to play CD-Audio, CD-Text,
recordable CD (CD-R) and re-writable CD (CD-RW) type discs.
CD-DA Format Only: The Cambridge Audio Azur 651C CD player can play
only discs recorded in the CD-DA format designed for music reproduction. Do
not attempt to play a disc containing other data, such as MP3, WMA, or AAC
on this unit.
CD Transport: The Azur 651C uses Cambridge Audio's legendary custom made audio-only, dedicated CD
transport that has been tweaked even further using techniques derived from the
740 series. This well-proven transport guarantees incredible rigidity and the CD
drawer itself has been designed to offer a smooth, high-end feel.
S3 Custom CD Servo Drive: Cambridge Audio's CD-only S3 Custom
CD Servo employs a custom designed chipset and the latest double-sided
surface-mount technology for ultra short signal paths with freedom from wire
links. Circuits and software have been meticulously designed, so the S3 can
dynamically adjust focusing, tracking, and output level of the laser in
real-time, allowing for maximum retrieval of the digital information and jitter
minimization. This is all made possible by the implementation of a powerful ARM7
processor and complemented by a highly accurate master clock oscillator and
carefully designed impedance-matched clock buffering scheme.
Twin Wolfson WM8742 DACs (Digital to Analogue Converters): Twin
Wolfson WM8742 DACs (24-bit/192kHz) deliver a significant performance upgrade over the 651C's
award-winning predecessor and are implemented in a dual differential
configuration (each channel has its own DAC to process information). A
sophisticated Two-Pole Dual Differential Double Virtual Earth Balanced Bessel
filter configuration rejects virtually all noise and distortion present in the
DACs and filters them to produce an unprecedented level of performance.
Twin Digital-to-Analog Conversion System: The all-new twin digital-to-analog
conversion system feature a selectable digital filter with 3 settings to suit
your own listening preferences and of course your own system.
- Steep Roll-Off Filter: The Steep roll-off filter exhibits strong
attenuation of aliasing images outside the pass band (i.e. above 22.05kHz)
at the expense of a little pre and post-ringing in the time domain.
- Linear Phase Filter: The Linear phase filter uniquely features
'constant group delay' which delays all audio signals at all frequencies by
the same amount meaning all audio is fully time-coherent at the output.
- Minimum Phase Filter: Minimum phase meanwhile does not feature
constant group delay but rather the coefficients have been optimized without
feed-forward so that the impulse response exhibits no pre-ringing in the
Audiophile Grade Toroidal Transformer: Unlike most CD players, who use cheap laminate type transformers, the
Cambridge Audio Azur 651C uses an audiophile grade toroidal transformer offering minimal electro
magnetic interference and delivering superior audio performance.
Double-Sided Surface Mount Technology: All PCBs and DAC stages feature
double sided surface mount technology, eliminating wire links and giving ultra
short signal paths.
Polypropylene Capacitors: Low inductance resistors and polypropylene signal capacitors are used for
superior audio performance.
Wrap-Around Casework Design: A wrap-around casework design with
substantially thick brushed aluminum front panel, and dual layer damped feet,
gives enhanced resonance control.
Standby Circuit: This innovative new circuitry design allows
compact disc player to consume less than 1 watt of power when in Standby, but
itself remains totally isolated and non-detrimental to the sound quality when
the CD player is in operation.
DFSTN Display: To ensure simple operation, a high contrast reverse black
DFSTN (Double Film Super Twisted Nematic) display offers excellent feedback of
the 651C's playback features, which now include CD-text support. On inserting a
disc, the CD player will take a few seconds to read the Table of Contents (TOC)
information from the disc. The display will then show the number of tracks on
the CD and the total length of the CD. If the CD incorporates CD-text, the name
of the album will scroll once (the number of tracks remains stationary
throughout). Once playback of an individual track begins, the track number,
total number of tracks, and playtime will be displayed. On a CD containing
CD-text, the track name will scroll once.
Power On/Off: The 651C compact disc player's main power
on/off switch is located on the rear-panel. Once the CD player's rear-panel main
power switch has been turned On, you can switch the 651C on/off using the
front-panel Standby/On button.
Front-Panel Controls: The Azur 651C uses Cambridge Audio compact disc
player offers the following front-panel controls - Standby/On, Open/Close tray,
Play/Pause, Stop, and Skip/Scan.
Auto Play Setting: The Cambridge Audio Azur 651C can automatically
start playback of a disc inserted into its drawer without the unit's "Play"
button being pressed.
Playback Functions: The 651C compact disc player offers Repeat,
Random, and Program playback controls.
- Repeat: You can repeat a specific track or an entire disc.
- Random: You can play all the tracks on a disc in random order.
- Program: You can program up to 30 tracks on a disc to play in a
IR Remote Control: The 651C compact disc player is supplied with an
Azur Navigator remote control that operates both this CD player and Cambridge
Audio Azur-series amplifiers. The Azur 651AC Navigator remote control can also
control the basic functions of Apple devices, such as Apple TV and Apple's
iPod/iPhone/iPad when docked in a Cambridge Audio or Apple dock (sold
Note: The remote operates off of three "AAA" batteries
Auto Power Down: If desired, the 651C can shut itself down if not used
for a period of time. Power down after an inactive period (no disk playback or
any functions of the player used) of 5, 10 or 15 minutes can be selected.
Analog Audio Outputs: The Cambridge Audio Azur 651C single disc
compact disc player is fitted with gold-plated stereo analog audio outputs (RCA)
to connect to your analog stereo receiver.
Digital Audio Outputs: The Cambridge Audio Azur 651C CD player is also
fitted with two digital audio outputs. One optical (toslink) digital audio
output and one coaxial (RCA) digital audio output. These digital outputs let you
connect the player to your digital receiver.
IR Emitter Input: The 651C features a IR Emitter input (3.5mm) which
allows modulated IR commands from multi-room systems or IR repeater system to be
received by the CD player.
Control Bus Input/Output: The 651C features a Control Bus Input &
Output (RCA), which allows un-modulated commands from multi-room systems or
other components to be received by the player and loop out to another unit.
Detachable AC Power Cord: The Cambridge Audio 651C operates off of
standard household AC current using the supplied detachable 6' AC power cord.
D/A Converters: Dual Wolfson WM8742 24-bit/192kHz DACs
Analog Filter: 2-Pole Dual Differential Bessel Double
Virtual Earth Balanced
Frequency Response: 20 Hz to 20,000 Hz (+/- 0.1 dB)
Total Harmonic Distortion:
- @ 1 kHz (0 dbBFs): < 0.003%
- @ 1 kHz (-10 dBFs): < 0.005%
- @ 20 kHz (0 dBFs): < 0.002%
IMD (19/20kHz) 0 dBFs: < 0.005%
Linearity @ -90dBFs: +/-
Clock Deviation: +/- 20 ppm
Stopband Rejection (>24kHz):
Signal-to-Noise Ratio: 115 dB
Total Correlated Jitter: < 140 pS
- @ 1 kHz: < -100 dB
- @ 20 kHz: < -99 dB
Output Impedance: < 50 ohms
- Max Power: 25 watts
- Standby Power: <1W